Power-punch.



No. 874,183. PATENTED DEC. 17, 1907 G. GORDON & H. HART.

POWER PUNCH. APPLICATION FILED MAI-1.24. 1905.

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- PATENTED DEC. 17, 1907. G. GORDON & H. HART.

.POWER PUNCH.

APPLICATION FILED 111111.24. 1905.

PATENTE D DEC. 17. 1907.

G. GORDON & H. HART.

POWER PUNCH. APPLIOATION nun mum. 1905.

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:8 I 9 w r 0. GORDON & H. HART. POWER PUNCH.

APPLICATION FILED IAR. 24, 1905.

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PATENTED DEC. 17, 1907.

UNITED STATES PATENT OFFICE.

CHARLES GORDON AND HARRY HART, OF MILWAUKEE, WISCONSIN, ASSIGNORS TOMILWAUKEE HARNESS MACHINERY COMPANY, OF MILWAUKEE, WISCONSIN, A

CORPORATION OF WISCONSIN.

POWER-PUNCH.

Specification of Iietters Patent.

Patented Dec. 17, 1907.

Application filed March 24.,1905. Serial No. 251,763.

To all whom it may concern:

Be it known that we, CHARLES GORDON and HARRY HART, residing inMilwaukee, in the county of Milwaukee and State of Wisconsin, haveinvented a new and useful Improvement in Power-Punches, of which thefollowingis a description, reference being had to the accompanyingdrawings, which are a part of this specification.

This inventin relates to power punches and especially to power punchesdesigned for punchingleather and the like, and has for its object toimprove upon the general construction of such devices.

Another object of this invention is to produce a power punch with itswork table adjustable toward or away from the punching mechanism as wellas transversely adjustable to the path of movement of the punchingmechanism.

Another object of this invention is to improve upon the construction ofthe punch ing and cutting devices.

Another object of this invention is to provide a means for automaticallymoving the work to its proper position simultaneously with the startingof the machine in operation.

Another object of this invention 18 to provide suitable adjustableguides of novel construction.

Another object of this invention is to provide a suitably operatedblower for keeping the table clear of punchings.

Another object of this invention is to provide a novel form oflubricating journal bearing especially adapted for use with blower fans.

With the above and other objects in view the invention consists in thedevice, its arts and combinations of parts as herein set orth and theirequivalents.

Referring to the accompanying drawings in which like characters ofreference indicate the same parts in the several views Figure 1 is afront elevation of a power punch embodying this invention; Fig. 2 is aside elevation thereof with parts broken away; Fig. 3 is a sectionalelevation of the punch proper the punching table and. their associatedparts; Fig. 4 isa sectional plan view taken on the plane of line 4- 4 ofFig. 3; Fig. 5 is a sectional elevation of an end cutting tool asemployed with the poner punch of this invention; Fig. 6 is a frontelevation of a punching tool also employed therewith; Fig. 7 is alongitudinal sectional view thereof on the line 7 -7 of Fig. 6; Fig. 8is a transverse sectional plan view thereof on the line 88 of Fig. 7;Fig. 9 is .a vertical sectional view of the blower fan; Fig. 10 is averticalsectional view of one 'ournal bearing thereof, on the line 10-10of Fi 9; and, Fig. 11 is a plan view of the slotted wick plug shown inig. 9. 1

In these drawings 15 represents a standard or supporting base to whichis secured a head frame 16 having j ourn'aled in its upper part a crankshaft 17 carrying a loose pulley 158 which is adapted to be clutchedthereto by a suitable clutch mechanism 19 and is driven by a belt 20from a pulley 21 mounted on a suitable countershaft 22. The countershaft 22 is journaled in bearings 23 of the standard or support 15 atright angles to the vertical plane of the crank shaft :17 and isprovided with a driving pulley 24 which is adapted to be driven by anysuitable source of power to cause the operation of the countershaft 22.The-loose pulley 18 is driven from the counter shaft 22 through thebelting comiection 20, and the clutch 19 is adapted to cause the crankshaft 17-to partake of its motion when a suitable treadle 25 is owratrd. The treadle 25 is pivoted to an upright post 26 at the rear ofthe machine base and extends through openings in the standard 15,receiving an upward spring pressure from a coil sprin which it moves,and being connected to the clutch mechanism 19 by means of :1.connecting rod 29.

The crank shaft 17 carries a crank 30 at its front end which fits withina sliding block 31 having a horizontal sliding movement in a ram whichhas a vertically sliding movcment in a guideway of the head frame It}. Apunch holder in the form of a bar 33 1S 'iirinly secured to the rain 32by having'a top 27 surrounding a split stud 28 through more punch blocks41-with dove tailed slots therefor.

tailed flange 40 with the front undercut deeper than the other and uponwhich are adapted to be adjustably clamped one or 42 in their upper endsto receive the dove tailed flange 40. The upwardly extending frontflange of the dove tailed slot 42 has a set screw 43 threadedtherethrough to bear upon the front edge of the dove tailed flange 40and s curely clamp the punch block 41 to the unc holder 35.

T e punch block 41 has a circular boss 44 on its bottom which has acentral screw threaded bore into which is threaded a tubu lar punch 45;The boss 44 is partially severed from the punch block 41 by a slot 46extending half way around it between the boss and the punch block, avertical slot 47 serving to split the boss at one end of the slot 46 sothat when a clamping ring 48 'is fitted around the boss and the clampingscrew 49 thereof is' tightened the boss 44 is clamped tightly upon thetubular punch 45 to revent its working loose. The punch bloc 41 has aninclined discharge opening 507t0 lead the punchings away from the upperend of the tubular punch 45. The clamping ring 48 has a screw 51threaded therein securing in placea coil spring 52 which surrounds thetubular punch 45 and serves as a stripper At one end of the punchholder41, as here shown, acutter block 53 is clamped to the dove tailed flange40 by parts identical with those of the punch block 41, andthis cutterblock consists principally of a cylindrical boss or body which isthreaded at its upper portion and is unthreaded at its lower portion andhas a knurled nut '54 threaded on the thre'aded portion thereof and acylindrical base ring 55 of a semi-cylindrical cutter blade 56 fittingaround the unthreaded portion and bearing on the knurled nut 54. A disk57 is fitted upon an annular shoulder of the cylindrical base and has aset screw '58 passing therethrough and threading into the body portionof the cutter-block 53 to clamp the cutter against the nut 54. Thecutter may be adjusted to raise or lower its cutting edge by firstadjusting the nut 54 upon the cutter block and then tightening the setscrew 54 until the cutter is properly clamped in position.

Beneath the punches and to the front face of the head frame 16 isvertically adjustably clamped a bracket table 59 by means of bolts 60passing through vertical slots 61 in the vertical portion of the brackettable and through the front face of the head frame 16 with large handnuts 62 threaded on their ends. Adjusting screws 63 are threaded throughforwardly extending bosses 64 at the upper end of the standard or base15 and bear uplon lugs 65 0f the bracket table so that w en the bolts 60are loosened by loosening and is adjustably secured thereto by havingbolts with winged nuts 68 assing through transverse slots 69 in the cm sof the plate 67' and also through longitudinal slots 70 in the ends ofthe bracket table 59, which arrangement permits of adjustment of theplate 67 i on the bracket table 59 in any direction and of securelyclamping it in any position to which it may be adjusted. The plate 67has an upwardly extending flange 71 along its front edge and its rearedge is curved to avoid striking the head frame 16 during theadjustments thereof.

jecting lugs 72 through which are threaded clamping screws 73 bearing uon a follower plate 74 which is adapted to 0 amp between Near the endsof its rear edge it is provided with upwardly proit and the flange 71 anumber of strips of wood 75 or other soft material which will form asuitable bed or support for the work that will not dull the edges of thecutting tools.

A shelf 76 has a depending flange 77 near its rear edge which is clampedto the flange 1 71 by screws 78 and the shelfportion overhangs saidflange 71 to make said shelf portion practically a continuation of theupper surface of the strips 7 5, the flange 7 7 being provided with aweb 79 connecting it with the under side of the shelf 76 to strengthenthe construction.

The head frame 16 has a boss 80 projecting into the open space 81thereof, through which boss is rotatably fitted a plug 82 having anannular flange 83 countersunk in the front face of the head frame and aknurled nut 84 threaded up to a shoulder on its other end to constitutea means for turning the plug 82 in the boss. A tubular stem 85 slidablyand rotatably fits through the plug 82 longitudinally thereof andeccentric therewith so that as the plug 82 is rotated in its bearing inthe head frame the tubular stem 85 will be raised or lowered withrelation to the punching table. In the rear end of the tubular stem 85is threaded a set screw 86 which bears against a pin 87 extendingthrough the stem, forcing it to press against a gage rail 88 whieh'has adove tailed rib on its back extending lengthwise thereof and fitting ina correspondingly shaped slot in a head on the end of the stem 85.

the set'screw 86 is loose, but is locked inits V The gage rail isslidably adjustable on the stem 85 by means of this dove tailedconnection whenadjustments by the pressure of the pin 87 thereon whenthe set screw is tightened. The stem 85 may be moved in the plug 82toward or away from the punching and cutting tools to the desiredextent, which may be determined by a series of graduations 89 thereonshowing beyond said plug, and then the stem may be bound in thisposition by tightening a clamping screw 90 which is threaded through theside of the boss 80 and passes through a slot 91 in the plug 82 andbears against the stem 85 so as to bind the stem and plug againstmovement.

When it is desired to adjust the gage rail 88 nearer to or farther fromthe punching and cutting tools it is only necessary to loosen theclamping screw 90 and slide the tubular stem 85 within the plug 82 tothe desired position; and when a. vertical adjustment of the gage rail88 is desired this may be accomplished by turning the plug 82 by meansof its knurled nut 84 so as to cause the tubular stem 85 which iseccentric therewith to raise or lower the gage rail and when the desiredposition of the gage rail is reached the tightening of the clampingscrew 90 not only prevents the tubular stem from sliding in the plug 82,but also prevents said plug from turning in its bearing, the tubularstem and the plug being clamped between the bearing for the plug and theclamping screw 90.

In order that the gage rail 88 which limits the position of the materialto be punched laterally of the punching and, cutting mechanism may besupplemented by a means for limiting the position of the materiallongitudinally of the row of punching and cutting mechanisms, a gage rod92 is provided which is of a U-shape with one arm considerably longerthan the other and passedthrough registering openings in the pair ofwebs 66 of the bracket table. Except when clamped by a set screw 93threaded in one of said webs and bearing thereon said gage rod 92 isfree to slide in these openings so as to bring its shorter end, whichextends around the end ofthe punch table, nearer to or farther from theend cutting tool 56 and thereby form a stop against which the materialto be punched may strike to determine the position of said material forthe punching and cutting operation, said short arm of the gage rodresting upon the punch strips 75, preferably in alinement with thepunching'and cutting mechanism. i

It is desirable that a means should be provided for assuring thematerial to be punched being moved all the way up to the guide rail 88before the punching and cutting operation, and to this end there isprovided a rocker arm 94 to be operated by the depres sion of thetreadle 25 and which carries a gage finger adapted to move toward thework as the machine is started in operation.

The rocker arm 94, is rigidly mounted on shaft 95 which is ournaledthrough the two webs 66 of the bracket table 59 and' is provided nearone end with a shouldered member 96 rigidly keyed thereto and which isadapted to engage with a shouldered hub 97 of a crank arm 98 on theshaft, connected by means of a connecting rod 99 to the front portion ofthe treadle 25. A sleeve. 100 which is also rigidly'keyed to the shaft95 has a coiled spring 101 fixed to it at one end,- the other end ofsaid spring being connected to the crank arm 98, so that the tendency ofsaid spring is to cause the shoulders of the hub 97 and the shoulderedmember 96 to remain in engagement, but permitting the crank arm 98 tocontinue moving to separate the shoulder of its hub from the shoulder ofthe shouldered member 96 when the rocker arm 94 is stopped in itsmovement from any cause before the treadle'25 has completed itsmovement. To adjustably limit the degree of movement of the rocker arm95 a set screw 102 is threaded through said rocker arm to strike againstthe front end of the horizontal portion of bracket table 95 and isprovided with a jam nut 103 to lock it in its adjustments.

The upper end of the rocker arm 94 forms a socket through which a stem104 is ad justably slidable and is bound in its adjustments by means ofa set screw 105 threaded through said socket end of the rocker arm. Theinner end of the stem 104 carries a pivoted finger 106 which rests uponthe shelf 76 and when the rocker arm 94 is swung by means of theoperation of the treadle 25 said finger 106 is adapted to slide upon theshelf 78 and the punch table strips 75 moving the material toward thegage rail 88 until the rocker arm 94 is stopped by the engagement of theset screw 102 with the bracket table 59; When the treadle 25 is releasedthe crank arm 98 is swung upwardly until the shoulders of the hub 97 andthe shouldered member 96 are engaged, when the rocker arm 94 is causedto swing therewith to its normal position as shown in Fig. 3.

The punchings which are ejected from the tubular punches 45 becomeobjectionable when no means is provided for removing them and one of theobjects of this invention is to automatically clear the punching tableof these punchings at all times. This is accom lished by means of ablower secured to the standard orbase 15 discharging air through adischarge pipe onto the punching 109 forming an extension of the bracket107 The bracket 107 and its extension bracket 109 are provided withsockets 110 into which fit bosses 111 of pivoted journal bearings 112,the bosses 1 1 1 bearing against suitable washers 113 in the sockets 110and being clamped in position by means of clamping screws 114. By meansof the washers 113 the journal bearings 112 may be alined so that theyboth lie in the same vertical plane and the mounting of the journalhearings in the sockets 110 is such that their pivotal movement enablesthem to'automatically register in perfectalinement when a shaft 115 isjournaled therein.-

Each end of the shaft 115 is slightly reduced to fit within the journalbearings 112 and at the reduction in its diameter it is provided with anannular groove 116 and an annular flange 117 between the groove and thereduced portion of the shaft the flange 117 rotating in an internalannular groove 118 in the bore of the journal bearing which groovecommunicates by means of'a passageway 119 with an oil pocket 120 beneaththe bearing 112. At the other end of the journal bearing 112 is anotherpassa eway 121 leading to the bore of the journal earing through which awick 122 passes from the lower end of the oil pocket 120 to a slot 123of a slotted lug 124 which fits in the bore of the ournal hearing and isheld against the end of the shaft 115 to take the end thrust thereof bymeans of a shouldered screw 125 threaded in said bore of the journalbearing. The wick 122 continues from said'slot 123 through a smallerbore'126 of the journal bearing ex-' tending along the main bore thereofto the annular groove 118 and partiall co-inciding with the main bore,so that t e wick 122 practically rests upon'the reduced portion of theshaft 115. A screw lug 127 is threaded in the lower end of the oi pocket120 throu h which the contents :of the oil pocket may be drained forcleaningand a perforation 128 near the upper portion of the oil pocketserves as an 1nlet opening through which oil may be inserted in-the oilpocket.

The operation of the lubricating means for the journal bearing 112 abovedescribed is that the oil inthe pocket 120 is conveyed by means of thewick 122 through the passage way 121 and the slot 123 of plug 124 to thesmall bore- 126 where said wick extends the full length of the bearingortion bf the shaft 115 in contact with the s aft and supplying it withoil, the surplus oil in the bearing be ing thrown by the centrifugalaction of'the annular flange 117 into the ann lar groove 1 18 from whichit is returned to the oil pocket 'by means of the passageway 119.

- A suitable blower fan 129 is mounted on' theshaft 115 between thejournal bearings and within the fan casing 108 and a driving pulley 130is also mounted on said shaft 115 .is adjuste between the journalbearings 112 but outside of the casing, the bracket 107 being recessedat 131 to accommodate it. .A drlving belt 132 connects the drivingpulley 130 with a large pulley 133 on the countershaft 22 so that thefan wheel 129 will be driven thereby at a highspeed. The mouth of thefan casing 108 has connected to it a telescopically adjustable dischargespout 134 which is bent to first extend at right angles to its mainportion and then terminate in an inclined flattened discharge nozzle 135directing the blast of air along the line of unching and cutting toolsso as to effective y remove all punchings and scraps left upon thepunching table by the cutting and punching tools.

As the description of each of the several parts of the invention hasbeen accompanied y a statement of its operation and function to makeclear its construction and relation to the other parts, a furtherstatement of the operation of the machine need be only general.Therefore briefly resuming, the operation of the machine as hereindescribed 1s as follows. The driving pulley 24 being belted to asuitable source of power and causing the rotation of the countershaft22' drives the loose pulley 18 on the crank shaft 17 through the belt 20and the blower fan 129 throu h the belt 132. The clutch 19 being norma yout of connection, the punching apparatus proper remains inactive untilthe treadle 25 1s depressed. Previous to this, however, the properadjustments are to be made, first, of the punching table 139 with11318131011110 the punching mechanism by a vertical'adjustment thereofthrough set screws 63. Then the bed of wooden stri s 75 is to beadjusted horizontally in any 'rection by loosening the thumb bolts 68 topresent a new surface of the wooden strips 75 to the unching andvcutting mechanism if the mac ine has previouslybeen in operation. Thegages are to be adjusted by turning the knurled nut 84 when the clam ingscrew 90 is loose so as to raise or lower t e tubular stem 85 and causethe gage:rail 88 to rest upon the top of the bed of wooden strips 75 orwherever de'sired.

Its adjustment toward or away from the' punching and cutting mechanismis accomthrough the plug 82 and in its adjusted positions, both verticaland horizontal it is secured against accidental movement by thetightening of the clamping screw 90. The (glage finger 106 has itsforward movement etermi-ned by the position of-the set screw 'plished bysliding the tubular stem 85 i 102 so that it will stop at a distancefrom the ga e rail 88 equal to the width of the materia to be eiperatedupon, and the gage rod 92 screw 92 and sliding it to t e positiondesired with relation to the end cutting tool 56 and again tighteningthe screw 93 so that the matenal when fed along thewooden strips in itsbearings b loosening the 75 until stopped by the gage rod will be in theproper position to receive the punching and cutting operation without awaste of the material. Now, when the material is placed on the punchingbed and the treadle, 25 is pressed by the foot of the operator theconnecting rod 99 causes the gage finger 106 to slide acrossthe tableand press the material to be punched against the gage rail 88 whilesimultaneously the connecting rod 29 operates the clutch 19 and causesthe pulley 18 to rotate the crank shaft 17 and produce an operation ofthe punchin and cutting mechanism, the block 30 sh ing horizontally inthe ram 32 and the ram sliding vertically in its guideways of the headframe. Preferably the clutch 19 is of such a nature that it permits ofbut a single operation of the punchin r and cutting mechanism and thenautomatlcally disengages the ulley 18 from the crank shaft 17 until anotor de ression of the treadle 25, so that the materia having received itspunching and cutting operation may be removed at will having received aperforation from each tubular punch 45 and a rounded endcut by thesemi-cylindrical cutter blade 56, the arrangement of the unching andcutting tools as here shown eing that usually employed for cutting andpunching buckle strap ends for harness and the like though otherarrangements of these tools for other urposes may be adopted at will.The punc fiings dropped b the several punches and the waste materia leftby the end cutter will be immediately removed by the operation of theblast from the blower which is ke t in constant motion for that purposeand therefore the followin operations ofthe machine will not be hinderedby the presence of such punchings or waste material on the punchintable.

While a particular em odiment of this invention has been shown anddescribed for the purpose of illustratin this invention it is not to beunderstood therefrom that the invention is confined solely to suchdetails of construction and arrangement of parts, but that various chanes and alterations and substitutions may e made without departing fromthe spirit and scope of this invenion.

The object in locating the wick 122 above the shaft 115 is to avoidreducing the bearing surface of the bearin 112 since the belt 132 bywhich the said s aft is driven ulls downwardly thereon and to lace theore 126 for the wick beneath the s aft 1 15 would cut away a portion ofthe bearing surface of the bearing and cause rapid wear.

What we claim as our invention is,

1. In combination, a frame, a punching mechanism thereon, a table on theframe, 'a

punch bed adjustably mounted on the table,

a flange on one side of the punch bed, clampthe punch bed, and .stripsof soft material clamped on the punch bed between the clamping screwsand the flange thereof for receiving the material to be punched.

2. .1.11 combination, a frame, a punching mechanism thereon, a tablecarried by the frame, a punch bed adjustably mounted on the table, aflange on the punch bed, a clamping screw on the punch bed, a series ofstrips of soft material clamped to the punch bed between the clampingscrew and the flange thereof, and a shelf secured to the flange of thepunch bed at approximately the level of the-surface of the strips ofsoft material.

3. In combination, a frame, a table thereon, a punching mechanism on theframe above the table, a punch bed mounted on the table, boltsconnecting the punch bed with the table and passing through slotstherein at an angle to each other so that the punch bed may beadjustably clamped thereby to the justed and clamped to the table, aflange on the punch bed, a clamp screw on the punch bed, a number'ofstrips of wood clamped to g the punch bed between the clamp screw andthe flange, and a shelf secured to the flange with its top plateoverhanging the said flange and standing approximately in a plane withthe top surface of the stri s of wood.

5. In combination, a 'rame, a punching mechanism thereon, a punchingtable on the frame, a plug rotatably. mounted in the frame, a stemcarried by the plug eccentric thereto, a gage carried by the stem, andmeans for holding the plug in its adjusted positions.

6. In combination, a frame, a punching mechanism thereon, a punchingtable on the frame, a plug rotatably mounted in the frame and havingmeans for turning it, a stem carried by the plug eccentric thereto, agage rail carried by-the stem, and a screw threaded through the frameand adapted to press the plug against its seat to lock the plug in itsadjustments. A

7. In combination, a frame, a punching mechanism thereon, a tablecarried by the frame, a plu rotatably mounted in .the frame. a tubu arstem slidable in the lug and eccentric thereto, a gage rail slidab e inthe tubular stem, a screw threaded in the tubular stem and adapted tobind the gage 8. In combination, a frame, a punching mechanism thereon,a table on the frame, a

- plug rotatably mounted in the frame, a stem to, a gage rail carried bythe tubular stem, a

screw threaded in the tubular stem, a pin located in the tubular stemand adapted to be forced .by the screw against the gage rail to preventsaid gage rail moving on the tubular stem, and a clamping screw threadedthrough the frame and passing through a slot in the plug to bear uponthe tubular stem and so bind the plugand the tubular stem tov preventtheir moving out of adjustment.

-10. In combination, a frame, a unching mechanism thereon, a brackettabfe carried by the frame, webs on the bracket table, a U-shapedgagerod having a long arm slidable in openings through the webs andextending around the end of the bracket table with its shorter armresting upon the bracket table and adapted to be moved toward or awayfrom the path of the punching mechanism by sliding the longer armthrough the oted to the. stem and adapte fixed member on the sha one endfixed to the shaft and openings in the webs, and a set screw threaded inone of the Webs to lock the gage rod in its adjustments.

11. In combination, a frame, a punching I mechanism thereon, anadjustable bracket table carried by the frame, a shaft journaled in thebracket table, a rocker arm mounted on the shaft, a gage fingerpivotally mounted on the rocker arm and resting on the bracket table,and means for oscillating the shaft to cause the rocker arm to swing andbring the age finger against the material to be punc ed.

12. In combination, a' frame, a punching mechanism thereon, a tablecarried by the frame, a shaft journaled in the table, a rocker armcarried by the shaft, a stem adjustable on the rocker arm, a agefinger-piv- (I to rest on the table, and adjustable means for limitinthe movement of the rocker arm, a shoul ered ft, a' shouldered loosemember 'on the shaft, a spring having pressing against the loose memberto cause said memher to press its shoulder against the shoulder of theshouldered fixed member, an arm on the loose member, a treadle forroducing the operation of the punching mec anism, and a connecting rodconnecting the arm with the treadle;

13. In combination, a frame, a punching naled between the Webs, a rockerarm on the shaft, a stem adjustable on the rocker arm, a gage fingerpivoted to the stem and bearing on the table, a set'screw threadedthrough the rocker arm and adapted to engage the table to limit themovement of the rocker arm, a jam nut on the set screw to lock the setscrewiii its adjustments, a shouldered fixed member on the shaft, ashouldered loose member on the shaft, a fixed sleeve on the shaft, acoil spring having one end secured to the fixed sleeve and the other endbearing against the loose member and adapted to hold the shoulder of theloose member against the shoulder of the fixed member, a

crank arm on the loose member, a treadle for producing the operation ofthe punching mechanism, and a connecting rod connecting the crank armwith the treadle;

14L. In combination, a tool block, a boss formed thereon and connectedtherewith on one side but disconnected therefrom on the other side, saidboss being split and having a threaded bore, a punch threaded in thebore of the boss, and a clampfor clamping the boss against the punch.

15. In combination,'a punch block, a split boss formed thereon andpartially separated from the punch block by a slot between the boss andthe punch block, a punch threaded in the boss, and a clam ringsurrounding the amp the boss against punchln s communicating with thebore of the tubu ar punch, a clamping ring surrounding the boss, and ascrew threaded "through the clampin ring and bearin on the boss adaptedto 0 amp the boss against the tubular punch.

17. In combination, a punch block, a split boss formed thereon, andpartially separated therefrom by means of a slit between the boss andthe punch block, the split of the boss being located at one end of theslit, a

tubular punch threaded in the boss, an in- .clined passageway throughthe punch block' registering with the bore of the tubular punch, a claming ring surrounding the'boss,

and a screw t readed through the clamping ring and bearing on the bossopposite the slit thereof and adapted to clamp the boss around thetubular punch.

18. In combination, a punch block, a split boss formed thereon partiallse arated there- 1 from by a slit between t e oss and ,the punch block,a punch threaded in the boss, a

clamping ring surrounding the boss, a screw threaded therethrough andadapted to clamp the boss on the punch, and a coiled spring strippersecured to the clamping ring and surrounding the punch. j j

19. In combination, a punch block, a split boss thereon partiallyseparated therefrom b a slit between the boss and the unch bfiwk, apunch thread ed in the boss, a 0 amping rin surrounding the boss, ascrew threaded therethrough and adapted to clamp the boss around thepunch, a second screw threaded in the clamping ring, and a coiled springstripper secured to the clamping ring thereb i 20. In combination, atoolblo'ck, a thread-', ed boss thereon, a nut threaded on the boss, acutting tool having a cylindrical base fitting the boss, a-disk having-ashouldered seat in said cylindrical base, and a screw passed through thedisk and threading intothe boss. I

21. In com'blnatlon, a tool block, a threaded boss thereon, a nutthreaded, on the boss, a semi-cylindrical cuttin toolhaving acylindrical base fitting onthe oss and bearing on the nut, a disk havingan annular shouldered seat in said cylindrlca'l base, and a screw passedthrough the disk and threaded into the boss whereby the cuttingtool maybe clamped in adjusted positions on the tool block.

, v22. In combination, a-punching mechane ism having a suitablesupporting frame, a

bracket on said frame, a fan casin mounted roundin the blower fan andadapted to discharget e air at the punchin mechanism.

' 24. In combination, a punc ing mechanism provided with a suitablesupporting frame, a pair-of journal bearings having pivotal support fromthe frame by'means of bosses thereon pivotally mounted in sockets inmembers secured to the frame and havin adjusting screws clamping theminsai sockets, a blower fan journaled in'the journal bearings, and acasing surrounding the blower fan and adapted to discharge air atthepunching mechanism. 7

In testimony whereof, we afEx our signatures, in presence of twowitnesses. Q

' CHARLES GORDON.-

- HARRY HART.

Witnesses-z v R. S. O. CALDWELL,

ANNA F. ,SOH'MIDTBAUER.

